/*
Copyright (C) 2010 
Author		  Oliver Schenk
Contact		  Oliver.Schenk76@gmail.com

This program is free software; you can redistribute
it and/or modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 3 of the License,
or (at your option) any later version.
This program is distributed in the hope that it will be useful, 
but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with this program; 
if not, see <http://www.gnu.org/licenses/>.
*/

function showHint(number,elementcount) {
	for(i=0;i<elementcount;i++){
	  document.getElementById(i).style.display='none';
	}
  document.getElementById(number).style.display='block';
}



function validateFormOnSubmit(theForm) {
var reason = "";
  reason += validateEmpty(theForm.GoogleCalendarURL,'URL is empty\n');
  reason += validateEmail(theForm.EmailAddress);
  reason += validateEmpty(theForm.Password,'Password is empty\n');
      
  if (reason != "") {
    alert("Some fields need correction:\n" + reason);
    return false;
  }

  //alert("All fields are filled correctly");
  return true;
}


function validateUrl(fld) {
	var regexp = /(http|https):\/\/?/g;
	if(regexp.test(fld)){
        fld.style.background = 'White';
        var error = "";
	}else{
	    fld.style.background = 'Yellow';
	    var error = "Wrong URL format.\n"; 
	}
	return error;
}

function validateEmpty(fld,error) {
  
    if (fld.value.length == 0) {
        fld.style.background = 'Yellow'; 
 //       error = "The required field has not been filled in.\n"
    } else {
        fld.style.background = 'White';
        var error = "";
    }
    return error;  
}
function validateUsername(fld) {
    var error = "";
    var illegalChars = /\W/; // allow letters, numbers, and underscores
 
    if (fld.value == "") {
        fld.style.background = 'Yellow'; 
        error = "You didn't enter a username.\n";
    } else if ((fld.value.length < 5) || (fld.value.length > 15)) {
        fld.style.background = 'Yellow'; 
        error = "The username is the wrong length.\n";
    } else if (illegalChars.test(fld.value)) {
        fld.style.background = 'Yellow'; 
        error = "The username contains illegal characters.\n";
    } else {
        fld.style.background = 'White';
    }
    return error;
}
function validatePassword(fld) {
    var error = "";
    var illegalChars = /[\W_]/; // allow only letters and numbers 
 
    if (fld.value == "") {
        fld.style.background = 'Yellow';
        error = "You didn't enter a password.\n";
    } else if ((fld.value.length < 7) || (fld.value.length > 15)) {
        error = "The password is the wrong length. \n";
        fld.style.background = 'Yellow';
    } else if (illegalChars.test(fld.value)) {
        error = "The password contains illegal characters.\n";
        fld.style.background = 'Yellow';
    } else if (!((fld.value.search(/(a-z)+/)) && (fld.value.search(/(0-9)+/)))) {
        error = "The password must contain at least one numeral.\n";
        fld.style.background = 'Yellow';
    } else {
        fld.style.background = 'White';
    }
   return error;
}  
function trim(s)
{
  return s.replace(/^\s+|\s+$/, '');
}
function validateEmail(fld) {
    var error="";
    var tfld = trim(fld.value);                        // value of field with whitespace trimmed off
    var emailFilter = /^[^@]+@[^@.]+\.[^@]*\w\w$/ ;
    var illegalChars= /[\(\)\<\>\,\;\:\\\"\[\]]/ ;
   
    if (fld.value == "") {
        fld.style.background = 'Yellow';
        error = "You didn't enter an email address.\n";
    } else if (!emailFilter.test(tfld)) {              //test email for illegal characters
        fld.style.background = 'Yellow';
        error = "Please enter a valid email address.\n";
    } else if (fld.value.match(illegalChars)) {
        fld.style.background = 'Yellow';
        error = "The email address contains illegal characters.\n";
    } else {
        fld.style.background = 'White';
    }
    return error;
}
function validatePhone(fld) {
    var error = "";
    var stripped = fld.value.replace(/[\(\)\.\-\ ]/g, '');    

   if (fld.value == "") {
        error = "You didn't enter a phone number.\n";
        fld.style.background = 'Yellow';
    } else if (isNaN(parseInt(stripped))) {
        error = "The phone number contains illegal characters.\n";
        fld.style.background = 'Yellow';
    } else if (!(stripped.length == 10)) {
        error = "The phone number is the wrong length. Make sure you included an area code.\n";
        fld.style.background = 'Yellow';
    }
    return error;
}